Muller



Dec. 28, 1937. A. c. CHRISTENSEN MULLER Filed March is, 1935 3Sheets-Sheet l I l/VVf/VTOI? ALF/ZED C. CHRISTENSEN.

rramvns V Dec; 28, 1937 A. c. CHRISTENSEN MULLER Filed March 13, 193:5:5 Sheets-Sheet 2 A r ramvsvs I Patented Dec. 28, 1937 UNITED .STATESMULLER Alfred C. Christensen, Chicago, IlL, assignor to Herbert S.Simpson, Chicago, Ill.

Application March 13, 1933, Serial No. 660,549 4 Claims. 83-45) Myinvention relates to mullers. t It is the object of my invention toprovide a system of lubrication in a muller which is subjected todust,'grit and sand conditions so that v there will bela positiveautomatic oiling of all of the principal bearings of the. machine from acommon source either by pressure or by gravity to insure the lubricationof all parts of the machine without the special attention of the oper-1o ator.

It is a further object to provide such a system of lubrication that themovements of the lubricant will always be outwardly from the bearings toprevent the entrance of foreign material and 15 to provide incombination therewith resilient,

lubricant-saturated seals, which will automatically adjust themselves tomaintain a constant lubricated sealed condition to prevent the entranceof foreign materials into the bearings of the machine. H

It is a further object to provide a successive series of such seals sothat, in the event any foreign ma'terial'should creep by a portion ofthe seals, it will be stopped by other portions.

25 It is a further object to provide a muller in which avertical shaftbearing adjustment is located at the top of the cross headinsuring'proper bearing adjustment without dismantling any part of themachine.

It is aiurther object to provide a removable, sectional fillet in thecorner of the crib and wear plate to prevent sand from building up andwearing the plow point excessively.

It is a further object to provide muller wheels having tires detachablywedged on the wheels thereby permitting of reversal of the tires as theywear.

It is a further object to provide positive outside plow adjustment tocompensate for wearv on 40 the plow without changing the original angleof the plow, the adjustments being only out toward the crib anddownwardly toward the wear plate.

It is an object to provide a cross headand rocker arms to eihcientlyshed any sand away 45 from the lubricated bearings.

It is a further object to provide a detachable hub for the driving gear.so that a complete assembly of the vertical shaft and turret can bemade outside of the mixer and the insertion there- 50 of can be madefrom the top of the bed plate.

It is a further object to arrange the mullers in a retarded positionbehind the center line of mill to cause the mullers to, rotate morefreely and to arrange the leverage of the rocker am so I 55 as toprevent the sticking of the pivot shaft.

' the limits of the muller dimensions.

It is a further object to provide a shim construction for limiting thedownward movement of the muller so that, by removal of the shims,adjustments can be made in accordance with the wear on the muller wheelwithout the necessity 5 of using screws that corrode and stick and onwhich it is diflicult to get a fine adjustment.

It is a further object to provide a composite unit of speed reductionand power drive within Referring to the drawings:

Figure 1 is a top plan view of the muller;

Figure 2 is a section on the line 2-2 of Figure 1;

Figure 3 is a side elevation of the outer scraper arm looking at the armfrom the right hand side in Figure 1;

Figure 4'is a section on the line 6-4 of Figure 1;

Figure 5 is a top plan view of the muller drive 'head orspider on top ofthe driving shaft and column in the center of the muller;

Figure 6 is a section on theline 66 of Figure 1 showing in elevation themuller mechanism and in particular the scraper and plows; 4

Figure '7 is a top plan view in detail of one of the muller arms showingthe streamline characteristics for shedding sand;

Figure 8 is a side elevation of Figure 7 looking in the direction fromthe bottom of Figure 7;

Figure 9 is a. side elevation from the outer scraper or plow;

Figure 10 is a front elevation of the attaching face shown in a diagonalposition on the left hand of Figure 5 for the inner scraper arm;

Figure 11 is a front elevation of the exterior of the muller wheelshowing the four attaching bolts for the' tire on the wheel.

Referring to the drawings in detail, l indicates a driving shaft from asuitablesource of power, such as an electric motor. This drive shaft ismounted in a speed reducing unit 2, the driven shaft of which isindicated at 3 carrying the beveled pinion 4 meshing with the beveledgear 5 (Figure 2).

One of the features of the invention is the mounting of this beveledgear detachably by the bolts 6 upon a hub I in such a manner that theentire gear can be removed without disturbing the assembly of theremainder of the muller drive. The bottom of this hub is engaged by the.plate 8 retained in position by the bolts 9 on the bottom of thevertical muller shaft Iii which is located within the hollow column ii.The hub I which has the flange la, to which is bolted by the bolts 6 thegear 5, acts as a support for an oil seal ring I2 extending from theflange 1a to the bottom of the column I I. In a skirt I3 of this sealring is a felt seal I4 that is supplied with lubricant as hereinafterdescribed. Between the inside of this skirt I3 and a collar I5.of thehub 1 is a pair of leather seals I6 held in position by springs I1within cages I8. Above and resting upon this hub is the inner race I9for a plurality of roller bearings 28, the outer race for which 2Iengages with the inner wall at the lower end of the column II andinterlocks with a shoulder on the top of the ring I2 thus tying thewhole structure together.

Within the column II is achamber 22 which may be filled with lubricant,if desired, or may be filled with plain hearings in. the spaces 23 and24 in the event that the roller bearings herein described are notemployed.

The roller bearings 26 at the top of the column II have an outer race 21and an inner race 28. The outer race rests upon and engages with acollar 28 which has on the inside a leather seal 38 with a spring 3I andcage 32 and on the outer side is a pair of felt rings 33 which arecompressed as shown by the depending diagonal flange 34 on the spider ordriving head 35 which rests on top of the inner race 28. This spider orhead 35 is retained on the shaft I8 by the nuts and washers generallydesignated 36.

. Formed in the spider or driving head 35 is a chamber 31- containinglubricant enclosed by a cover 38 and having a detachable pipe 33 with acover 48 having a telltale lubricant measuring rod 4I formed as a partthereof. The lubricant in this reservoir has access through thepassageway 42 to the shaft 43 and the shaft which are the axle shaftsfor the muller wheels 45 and 46' respectively.

Thus, these axles are lubricated at a convenient place at the top of themachine by either gravity or under pressure. This same reservoirsupplies lubricant through the passageway 41 to the upper bearings 26and thence downwardly to the lower bearings 28 through the chamber 22.The lubricant being under gravity tends to move downwardly and outwardlycarrying with it any foreign materials such as dust. grit or sand, andthoroughly saturates the felt seals and leather washers in order tomaintain a plurality of successive oil-saturated, tight joints toprevent foreign material getting into the bearings.

All that the operator has to do to lubricate is to place lubricant inthe reservoir 31 by gravity and this insures a continuous supply oflubricant.

The spider head 35 which carries the axles 43 and 44 in the sleeves 48and 48 is provided with laterally disposed open top chambers 58 in whichthere are a plurality of shims 5| supporting the limit arm 52 whichlimits the extent of downward movement of the muller 45 or 46. When itis desired to adjust the downward movement a shim is removed.

It will be further noted that the mullers are carried in bracket arms 53and 5311 which carry the arms 52. One end of each arm 53 and 53a isformed in a sleeve 54 mounted on one of the axles 43 or 44 and the otheris formed into a sleeve 55 carrying a muller axle 56. The axis of themuller axle 56 is retarded past the center line of the mill therebyretarding the mullers and causing them' to rotate more freely.

The muller itself is composed of a muller wheel 61 mounted on spacedbearings 58 on the axle 56 which are retained by the plate 59 and bolts68 in position. The outer bearing and end of the axle is covered by acover plate 6| detachably mounted by bolts 62 in a recess 63 in thewheel 51. Lubricant is supplied to the bearings through the port 64 inthe plate 6|. These bearings are mounted in a chamber 65 within thewheel 51 which can contain the necessary lubricant. The rear end of thischamber is sealed by a detachable right angle plate 66 held in positionby the screw bolts 61 on the muller wheel 51. The angular portion orcollar 68 of this closure plate forms a receptacle for an annular feltseal 69 which is forced into position by the skirt 6 I a on the sleeve55, the inner end of the skirt interlocking with a flange 18 on theplate 66. The inside of the collar 68 is provided with a spring pressedleather seal H for further retention of the lubricant and the exclusionof foreign material. The exterior of the wheel 51 has a tapered face 12engaging with a plurality of tapered wedge blocks 13 held in position bybolts 14 and clamping plates 15 engaging a shoulder 16 on the peripheryof the wheel 51. These wedge blocks 13 and clamping plates 15 engagerespectively an inner tapered surface 11 of a muller tire 18 and arecessed shoulder 19 on the tire. In this manner the tire is detachablymounted by a plurality of bolts (in this case four in number) so that,when the outer face of the tire wears, it may be quickly detached andreversed. This saves in first cost and reduces the cost of maintenanceof the surface of the muller wheel.

The muller arms 53 are provided with ridges 5311. (Figure 7) in-order tostreamline them so that the sand will fall off of the arms and notaccumulate thereon and thereby work its way into the bearings as towhich the foregoing precautions are taken so as to protect them.

As the sand cannot adhere and what little dust remains is excluded Iprovide the maximum safety for the hearings in this muller machine.

The spider 35 is provided with a vertical diagonally-disposed attachingplate 88 having a plurality of elongated slots 8I in'which are locatedthe adjusting bolts 82 (Figures 5 and 6) for vertically adjusting theinner plow arm 83, the lower end of which is connected by bolts 84 intoslots in the plate 83 to permit of the lateral adjustment of the innerplow 86.

The spider also is provided with a laterallyextending slotted bracket 81having slots 88 for receiving the adjusting bolts 88. In the upper faceof this bracket 88 is a radially-disposed groove 88 for receiving acorresponding rib 8| (Figure 6) on the bottom of the outer plow arm 82to guide it in its inner and outer movement when adjusted provided witha vertically-disposed attaching adjusting plate 83 having slots 84receiving bolts for retaining the outer plow arm 86 in adjusted verticalposition. This plow is adjusted by bolts 81 and is designated 98. It hasa round face 83.

The muller pan consists of a bed plate I88 having an annular flange I8Iwhich supports a side wall I82 and an interlocking removable sectionalfillet I83 retained in position by the bolts I84. Inside this fillet arethe wear plates I85 which cover the bolts I86 attaching the column II ina recess I81 in the bed plate I88. To the bottom of this bed plate isattached by the bolts I88 the gear housing 2. This plate I88 issupported by the legs I88.

The bottom I88 is provided with a door II8 that is suitably actuated bythe lever I I2 through 75 may be necessary to adapt it to varying condi-"--s, 1os,ses r .saidbearingstoward the Joints between the rothe shaftoperating in the 4. This door may be positioned eitherfas' indicated infull linesinlisure i orindottedlineaortheremay'be A two doors. a r

It will be \mderstood that I desire to compre-'- hend within myinvention such modifications as tions and'uses.

Having thus fully described my I claim as new and desire to by Letters sis: ,"'|;i-:-.'

1. In combination, amuller'pan, bearings muller means, a muller means inthe bearing a spider-"on the upper part of said shaft, for connectingsaid shaft muller means, a lubricant reservoir in said shaftspider. andmeans for connestingsaid'jlubricant reservoir with the inner sides ofsaid bearings whereby to lubricate the connection of the muller means tothe spider and the bearings for the shaft in the muller pan, saidlubricant reservoir being connected to direct lubricant outward fromsaid bearings toward the joints between the rotating parts and theirsupports.

2. In combination, a muller pan, having bearings muller m'eans' amullermeans driving shaft in the bearings, a spider on the upper part of saidsum. for connecting said shaft to said muller- (means, a lubricantreservoir in saidshaft spider,

and means for connecting said lubricant reservoir with the inner sidesof said bearings whereby to lubricate the connection of the muller meansto the spider and the bearings for the shaft in the muller pan bygravity. said lubricant reservoir being connected to direct lubricantoutward from ment of the same.

tating parts and their supports.

'3.- In .-ccmbina in, in a muller, a muller pan,

"muller whe'els-in the panfa muller driving shaft,

a muller, spider having areservoir therein pivotally column, and meansof communicating lubricant ings.

4. In combination, in a muller, a muller pan, muller wheels in the pan,a muller driving shaft, a muller spider having a reservoir thereinpivotally supporting said muller wheels and connected to said drivingshaft, :1. column for supporting said spider, bearings between saidshaft and said column, means of communicating lubricant to said bearingsfrom said. reservoir and to the pivotal supports for said mullers, andlubricantsaturated, means adapted to seal the joints beentrance offoreign material thereto. certain of said lubricant saturated meansincluding a packing supported by said spider, a packing supported on'thestop of said column and a collar located between said packings andsupported in place' on said collar, certain of said bearing means beingin contact with said collar and preventing movetween said column andsaid spider to prevent the

